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Why customers choose this item
✓AR15 castle nut part
✓Black finish coating
✓Firearm hardware component
✓Buffer tube locking nut
✓ATI Outdoors part
✓Replacement build component
Product highlights
AR-15 castle nut designed for securing buffer tube assemblies on rifle platforms
Steel construction supports durability under repeated installation and firing stress
Black finish provides corrosion resistance and long term surface protection
Precision manufacturing ensures proper fit with compatible buffer tube threads
Compatible with standard AR-15 receiver extension components and assemblies
Designed for firearm maintenance repair and upgrade applications
Product description
The ATI Outdoors AR15 Castle Nut is a firearm component designed for securing the buffer tube to the lower receiver on AR-15 platforms.
This castle nut is finished in black and is intended for use with standard AR-15 buffer tube assemblies. It is categorized within small parts and builder hardware and supports proper retention of the receiver extension during installation. The construction is designed for compatibility with common AR-15 configurations and supports routine maintenance or assembly tasks. This component is used in conjunction with buffer tube systems and locking rings as part of the firearm assembly. In typical setups, the ATI Outdoors AR15 Castle Nut is used for firearm assembly or maintenance applications.
Volume pricing for business and agency buyers, plus free ground shipping on most continental U.S. orders.
Business & agency accounts
Bulk discounts
Volume pricing, dedicated account management, ACH payment options, and special sourcing for businesses, agencies, law enforcement, and first responders.